Merge pull request #16203 from nextcloud/renovate/kotlin-monorepo

fix(deps): update kotlin monorepo to v2.3.0

Author: AndyScherzinger

gradle/libs.versions.toml

@@ -48,7 +48,7 @@ jsonVersion = "20250517"
 junit = "4.13.2"
 junitVersion = "1.3.0"
 juniversalchardetVersion = "2.5.0"
-kotlin = "2.2.21"
+kotlin = "2.3.0"
 kotlinxSerializationJson = "1.9.0"
 ksp = "2.3.4"
 leakcanary = "2.14"